Britain's International Development Secretary, Clare Short, resigned from the British cabinet today, ending weeks of speculation over her future.
Ms Short phoned UK Prime Minister Tony Blair to tell him she could no longer stay in the Government.
A Downing Street spokesman said: “She rang the Prime Minister just after 10am this morning to resign.”
Ms Short said in her resignation letter: "I have decided that I must leave the Government.''
She accused Mr Blair of breaching assurances he had given her on the role of the United Nations in governing post-conflict Iraq.
And she accused Blair and Foreign Secretary Jack Straw of “secretly” negotiating a UN Security Council resolution which contradicted assurances she had given in the Commons to MPs.